CVE-2020-13817

moderate-risk

Published 2020-06-04

ntpd in ntp before 4.2.8p14 and 4.3.x before 4.3.100 allows remote attackers to cause a denial of service (daemon exit or system time change) by predicting transmit timestamps for use in spoofed packets. The victim must be relying on unauthenticated IPv4 time sources. There must be an off-path attacker who can query time from the victim's ntpd instance.

Do I need to act?

0.35% chance of exploitation

EPSS score — low exploit probability

Not on CISA KEV list

No confirmed active exploitation reported to CISA

Patch status unknown

Check vendor advisories for fix availability and mitigation guidance

CVSS 7.4/10 High

NETWORK / HIGH complexity

Affected Products (20)

Ntp

Affected Vendors

Fujitsu Ntp Netapp Opensuse

References (14)

Mailing List http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00005.html

Mailing List http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00044.html

Vendor Advisory http://support.ntp.org/bin/view/Main/NtpBug3596

Issue Tracking https://bugs.ntp.org/show_bug.cgi?id=3596

Third Party Advisory https://security.gentoo.org/glsa/202007-12

Third Party Advisory https://security.netapp.com/advisory/ntap-20200625-0004/

Patch https://www.oracle.com/security-alerts/cpujan2022.html

Mailing List http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00005.html

Mailing List http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00044.html

Vendor Advisory http://support.ntp.org/bin/view/Main/NtpBug3596

Issue Tracking https://bugs.ntp.org/show_bug.cgi?id=3596

Third Party Advisory https://security.gentoo.org/glsa/202007-12

Third Party Advisory https://security.netapp.com/advisory/ntap-20200625-0004/

Patch https://www.oracle.com/security-alerts/cpujan2022.html

/ 100

moderate-risk

Severity 22/34 · High

Exploitability 1/34 · Minimal

Exposure 26/34 · High